Pipe-welding tongs



(No Model.) 2 Sheets-Sheet 1. R. NEILSON. PIPE WELDING TONGS.

110,432,211. Patented July 15, 1890.

Dirk V 41 vwmwkow @467) MM 074 (No Model.) 2 Sheets-Sheet 2.

R. NEILSON. PIPE WELDING TONGS.

Patented July 15,1890.

UNITED STATES PATENT OFFICE.

ROBERT NEILSON, OF REYNOLDTON, PENNSYLVANIA.

Pl PE-WELDING TONGS.

SPECIFICATION forming part of Letters Patent No. 432,211, dated July 15, 1890.

Application filed July 23, 1889- Serial No. 318,411. (No model.) i

To all whom it may concern.- bent toward each other, and one of the han- Be it known that 1, ROBERT NEILSON, a citidles is provided with a longitudinal slot, which Zen of theUnited States, residing at Reynoldreceives the extreme rear end of the other ton, in the county of Allegheny and State of handle, as shown in Figs. 1 and 2. Between 5 5 Pennsylvania, have invented certain new and the opposing edges of the bent part of the useful Improvements in Pipe-WVeldingTongs; handles, at a point in front of the interlockand 'I do hereby declare the following to be a ing part thereof, I arrange a cross-bar e of an full, clear, and exact description of the invenendwise-inovable rod 7r, whereby as the rod tion, such as will enable others skilled in the is drawn rearward the bar 6 rides against the 60 art to which it pertains to make-and use the bent part of thehandles and operates'to force same,'reference being had to the accompanythe jaws with a firm grip upon the plate it is ing drawings, which form a part of this specidesired to withdraw from the furnace. Surfication. rounding the handles (1 of the tongs is a ta- Myinvention relates to an improved device poring tubular casing or cover f, which is 6 for drawing butt-weld tubing through the bell; loosely attached to the said handles d by and it consists of a pair of tongs surrounded small set-screws g, which are fitted loosely in by a-casing or cover, a means for operating the jaws or the case, so that the jaws can the said tongs, together with certain other deplay or move a limited distance necessary for tailsof construction and combinationofparts, opening or closing the same; and said cas- 7o as will be fully set forth hereinafter. ing or cover f is provided at the small end In the accompanying drawings,-Figure 1 is with a nut or collar h and a straight cylina side sectional elevation of my improved dricalportion'i, which is usedfor handling the tongs constructed in accordance with my intongs. This tube fserves asa means for convention. Fig. 2 is a sectional plan view of Veniently handling and supporting the grip- 75 the same. Fig. 3 is an end elevation of my ping jaws, which are inclosed therein, and as improvement, showing the circular jaws of the tube passes through the welding-bell prior the tongs. Fig. 4 is aside sectional elevation to withdrawing the plate from the furnace, of amodification, showing thesame connected the gripping-jaws inclosed in the tube are to the buggy or means for drawing the sheets prevented from coming in contact with the 8 through the welding-ring. Fig. 5 is a face bell, which is advantageous, as itprevents the View of the fork of the buggy. Fig. 6 is a bent part of the jaws, or the jaws themselves, face view of the welding-ring. Fig. 7 is a from coming in contact with the welding-bell. sectional elevation of the same. Fig. 8 is a Attached to the cross-bar e is a rod it, having side elevation showing my improved tongs an enlargement Z formed on one end of the 85 5 mounted on a carriage, the track therefor, same.

and a part of a furnace in section. Fig. 9 is Heretofore it has been. the custom to weld a transverse section through the track, showa thin or narrow strip of sheet metal to one M ing the carriage in end elevation. Fig. 10 is end of the blank, which is used as a means a detail view. of securing the sheet to the carriage m, or 90 To put my invention into practice, I promeans for drawingthesame through the weldvide a pair of tongs having circular jaws a ing-bell c. \Vith this device the jaws a are and interlocking ridges b, in order to obtain a given a grip on the sheet and theenlarged firm hold of the blank or sheet of metal which end I of the rod 7t placed in engagement with forms the tube. These circular jaws a are of the V of the carriage m, the welding-ring c 5 a less diameter than the opening in the weldbeing, in the first place, slipped over the tapering-bell c, and are capable of passing through ing cover f and held stationarybya fixed bellthe same. These tongs are provided with insupport, hereinafter described. The carriage terlocking handles (1, in a manner that will m, moving back, draws the sheet through the admit a bar 6 between the same, which bar 6 ring 0 and butt-welds the two edges in a man- 100 when drawn back closes the jaws a of the ner well known to the art.

tongs. The rear ends of the handles (1 are In Figs. 8 and 9 of the drawings I have shown the carriage and the means for supporting and operating the same. The carriage is mounted on a track 1, the rails of which are supported at a suitable elevation by a frame or trestle work. At the rear end of the frame or trestle work, adjoining the furnace, I provide an upright or vertical support 3, which is perforated at 4 to permit of the passage of the tongs and theirinclosing-tube [O f through the same; and this perforation is enlarged or flared at its rear extremity to adapt the weldingbell c to be fitted snugly therein as the carriage is drawn backward, the movement of the bell being arrested by the support, and the bell is held in afixed po,- sition thereon while the carriage continues to move away from the support and to draw the sheet-metal plate through the bell and thus butt-weld the tube. The rear end of the car riage is provided with an elevated recessed or slotted grip 5, (see Fi gs. i, 8, and 9,) in which the forward headed end lot the endwise-movable rod 79 is fitted, whereby the movement of the carriage first operates the tongs to firmly grip the plate and draw the tongs and plate away from the furnace. Motion is imparted to the carriage by means of a traveling belt or chain 6, which is supported by pulleys 7 and S at opposite ends of the frame or trestle work, and the carriage can be connected to this traveling belt by a hook 9, which is pivoted to the front end of the carriage.

At Fig. 4 on the drawings I have shown a modification of my invention, which consists in a pair of tongs a and cover f, constructed in a manner that when the small end-of the cover f is attached to the carriage 1n and moved backward the cover f will press the handles (Z together, thereby tightening the jaws a of the tongs on the sheet. In this construction the jaws are fitted snugly within the open front end of the tube f, and the rear ends of the jaws are inclined in opposite direct-ions.

Between the inclined edges of the jaws is interposed a stop-pin or red d, secured in the casing or tubef, and which serves to separate the rear ends of the jaws and to force the gripping-surfaces thereof firmly upon the sheet-metal plate. One of the jaws is provided with an extension that runs clear through the tube and is headed at its rear extremity, so that the tongs are connected to the tube to move therewith and with the carriage when the latter is drawn away from the furnace, the jaws being held firmly gripped on the plate by the stop-pin on the tube, which prevents the jaws t'rom becoming separated.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. The herein-described tongs, consisting of the circular jaws a, pivoted together, the tapering tube f, inclosing the handles (1 of the said tongs, and a device whereby the jaws a may be automatically closed on the sheet and drawn through the welding-ring.

2. In a device for the purpose set forth, the tongs having circular jaws (L, the interlocking handles (1, the rod, and loop 6, for operating the jaws, and a casing or coveringf, surroundin g the handles (1 of the tongs, and an enlargement Z, whereby the same may be attached to the drawing buggy, substantially as set forth.

3. The combination, with a carriage, of a pair of gripping-jaws pivotally connected together and connected to the carriage, and a support for the gripping-jaws, which permits the latter to firmly grip the work by a movement of the carriage, as and for the purpose described.

4. The combination, with a carriage, of a tube connected thereto and the gripping-jaws supported within the tube.

5. The combination, with a carriage, a fixed bell-support, and a welding-bell, of a pair of gripping-jaws, which are pivotally connected together, and a supporting case or tube connected with the carriage, and in which the gripping-jaws are supported, whereby movement of the carriage operates to force the gripping-jaws firmly on the work, for the purpose described, substantially as set forth.

In testimony that I claim the foregoing I hereunto afiix my signature this 3d day of June, A. D. 1889.

ROBERT NEILSON. [L. 

